Shoot Anatomy and Morphology

Teresa Terrazas Salgado and James D. Mauseth

in Cacti

Published by University of California Press

Published in print October 2002 | ISBN: 9780520231573
Published online March 2012 | e-ISBN: 9780520927889 | DOI:
Shoot Anatomy and Morphology

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This chapter discusses the anatomy and morphology of cacti shoot, focusing primarily on its cellular characteristics and biomechanical properties. The shoot consists of internodes, nodes where leaves are attached, and axillary buds (the spine-producing areoles). The bud scales and leaves of axillary buds are the signature spines of cacti. The ability of cacti to adapt to xeric conditions is due to increases in water-storage tissue, especially in the cortex and wood, thickened cuticles, and the presence of a hypodermis. The fundamental tissue, cortex and pith, carries out two important functions related to xeric adaptations: photosynthesis and water storage.

Keywords: cacti shoot; shoot; internodes; axillary buds; xeric conditions; cortex; wood; hypodermis; pith; photosynthesis

Chapter.  9626 words.  Illustrated.

Subjects: Plant Sciences and Forestry

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